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Unformatted text preview: ollowSymLinks RewriteEngine on RewriteRule (.*) http://www.newdomain.com/$1 [R=301,L] REPLACE www.newdomain.com in the above code with your actual domain name. contact every backlinking site to modify their backlink to point to your new website. Note* This .htaccess method of redirecOon works ONLY on Linux servers having the Apache Mod- Rewrite module enabled. Copyright 2009 - 2013 Horowitz 27 Rule 11: Avoid Redirects Copyright 2009 - 2013 Horowitz 28 Rule 12: Remove Duplicate Scripts •  Hurts performance –  Extra HTTP requests (IE only) –  Extra execuOons •  Is it atypical –  2 of the top 10 websites contain duplicate scripts (JS and CSS) Copyright 2009 - 2013 Horowitz 29 Rule 13: Configure ETags •  Etags are used by clients and servers to verify that a cached resource is valid –  To check that the resource (image, script, stylesheet, etc.) in the browser’s cache matches the one on the server –  If there is a match, the server returns a 304 •  Unique idenOfier returned in response Etag: “c8897e-aee-4165acf0” Last-Modified: Thu, 07 Oct 2008 20:54:08 GMT •  Used in condiOonal GET requests If-None-Match: “c8897e-aee-4165acf0” If-Modified-Since: Thu, 07 Oct 2008 20:54:08 GMT •  If Etag doesn’t match, can’t send 304 •  Etag format varies across web servers –  –  Apache: inode-size-timestamp IIS: FileTimestamp:ChangeNumber •  Use ‘em or lose ‘em –  Apache: FileETag none –  IIS: http://support.microsoft.com/kb/922703/ Copyright 2009 - 2013 Horowitz 30 Rule 14: Make AJAX Cacheable and small •  •  •  •  The URL of an AJAX request is included inside the HTML; as it is not bookmarked or linked to, the requesOng page can be cached by the browser The AJAX request URL should include a dynamic v...
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